Saw-filing machine



May 1, 1928. 1,668,361

H. B. FOLEY SAW FILING MACHINE I 2mm Auz. l3, l925 2 Sheets-Sheet l Q'ZZ2 Z4 Q May 1, 1928. I 1,668,361

H. B.- FOLEY SAW FILING MACHINE 2 Sheets-Sheet 2 III/III] IIIIIILWIII/IIIII Patented May 1, 1928.

ururso STATES PATENT OFF HUGH B. FOLEY, 0F MINNEAPOLIS, MINNESOTA; 'MARY'1; FOLEY, ADI INISTRAT BII or SAID HUGHB. FOLEY, DECEASED, FOLEY sewTOOL 00., mconrona rsn,

ASSIGNOR, BY -MESNE ASSIGNMENTS, TO A CORRORATION OF MINNESOTA.

SAW-FILING MACHINE. I

and combinations of dethe novel devices I described and defined in viceshereinafter the claims.

In the accompanying drawings, which illustrate the invention,likeicharacters indicate like parts throughout the several views.Referring to the drawings:

Fig. 1 is a perspective showing the improved saw-filing machine arrangedto be motor-driven and showing a band or back saw or a section thereofin position for filing, the front and right-hand side of the inachinebeing exposed to direct View;

' Fig. 2 is a front elevation of the machine in perspective but with themotor removed, the parts of the machine at the front and left side beingexposed to direct view;

Fig. 3 is a fragmentary vertical section on the line '3-3 of Fig. 1;

Fig. 1 is a fragmentary view partly in elevation and partly in sectionon the line H of Fig. 1;,

Fig. 5 is afragmentary section taken approximately on the line 5 5 ofFig. 1, but showing a hand saw'positioned for filing;

Fig. 6 is a right side elevation. of the parts shown in Fig. 2, butshowing in position for {)lllIig a saw blade that has a reinforced ac iFig. 7 is a front elevation of the machine adjusted as shown in Fig, 2,but showing a hand saw or wood saw in position for filing, some partsbeing broken away;

Fig. 8 is a fragmentary View partly in front elevation and partly insection, showing one of the feed dogs; 7

Fig.9 is a view 'partly'in side elevation and partly in vertical sectionon the line 9--9 of Fig. 7 i p,

Fig. 10 is a transverse vertical section taken on the line 10-1O of Fig.9

.Fig. 11 is a. horizontal section on the line 11-11 of Fig.v 10;

Fig. 12 is a fragmentary perspective with some parts sectionedapproximately on the line 1212 of Fig, I;

Fig. 13 is a vertical sectionshowing in 1,224,293, r May 1, 1917;Generally stated, the invention consists of Application filed August 13,1925-. Serial =No. 50,066,

connection withthe' vise, means for holding a circle sawpositioned forfiling; and

Fig. 1 1 is afviewpartly in elevation and partly in vertical section,showing the details of the saw-holding device illustrated in Fig. 13. Ip i In Figs. 1 and 2, the saw blade, which may be assumed to be aportion of a band saw, hack saw, or meat saw, or the like, is indicatedby the character a; in Fig. 6, the ribbed saw blade is indicated by thechar-, actor I); and in Figs. ,7 and 12, the' hand saw blade isindicated by the character a. For the holding and sharpening of theseseveral different kinds of blades, a vise or clamping device, isprovided, which, for the several purposes, has'slightly diiferent at-'tachments or details, all as will presently ap pear. The vise, as shown,comprises ayokelike or U-shaped member 15 and a loose member 16. Thevise member 15 is formed integral with or otherwise rigidly secured to aflat horizontal base plate 17 and'a vertical. face plate 18, whichlatter isformed with a large opening 19. Theloose vise member 16 isclamped to the member 15 by. a clamping screw 20, and thesaw blade isarranged to run loosely between'the upper Usually, an ordinarythree-sided file d will beused to sharpenthe teeth of the saw, and thisis arranged to be carried and given a compound endwise and up anddown'movement by a crosshead guide thatis mounted for angularadjustments inrespect to the saw, the face plate 18' and base 17.v Thecrosshead guide, as shown, isin the form of an upright plate 22 providedat the upper portion of its front end with an arm 23' that ispivotallyattached by a machine screw or stud. 24 to lug on the upper edge oftheface plate 18. The face plate 17 maybe rigidly secured by screws orotherwise to a bench or suitable support and at its rear edge it isformed with a segmental groove 25 that extends on the arc of acircle;that is struck from the axis of the pivot screw 24:.

The base plate 17, along the slot 25, is

graduated to indicate the angle at which the crosshead guideand, hence,the file,,will

be set in respect to the, saw or in respect to a ing the crosshead guideplate 22 where set, there is showna clamping bolt 26 that works throughthe slot and through a perforation in the downturned lug 22 of saidcrossheadguide, as best shown in Fig. 3, and which bolt is provided witha lever-equipped clamping nut 27.

Rigidly secured to the crosshead guide plate 22 at upper and lower ends,but lat-- erally oflset therefrom, is a pair of parallel vertical guiderods 28. Mounted on these rods 28 for slightly vertical movements is asecondary crosshead guide 29, in the upper and lowerfianges of which aplate-like crosshead 30 is mounted for horizontal sliding movements.This crosshead plate 30 is provided with a forwardly projectingfile-carrying arm 31 equipped with longitudinally spaced depending fileholders. Those file holders, as best shown in Figs. 6 and 9, include.downwardly spring-pressed plunger-s 32 that are seated in sleeve-likeportions 33 of the arm 31 and are provided at their upper ends withthumb nuts 34, by means of which they are made vertically adjustable.The plungers 32, at their lower ends, are formed with sleeve-like heads35 and 36. The file c is adapted to be inserted directly into the head35 and the other end of the file is adapted to be inserted into one orthe other end of a double-ended sleeve-like socket 37 that is insertedaxially through the head 36 and is arranged to be secured in differentaxial and rotative positions by a set screw 88. The shank of the outerplunger 32 is flattened and is loosely engaged by a short set screw 39,(see Fig. 11), that holds the same against rotation while permittingvertical adjustments of said plunger. When the thumb nut 34 is loosened,the plunger 32 will be pressed downward by its spring, thereby giving ayielding movement in the filing action.

The numeral 40 indicates a short shaft journaled in the angularlyadjustable crosshead guide plate 22 and provided at its outer end with aspur gear 41, which, as shown, is connected by a spur pinion 42 to apinion 43 se cured on the hub of a fly wheel 44 also jour nale'd to thecrosshead bearing plate 22. The

fiy wheel 44 is shown as provided with a crank handle 45, by means ofwhich it may be rotated by hand when the machine is to be hand-operated.When the machine is to be operated from a motor, as illustrated in Fig.1, themotor 46is adapted to be bolted or secured on top of the crossheadplate 22, and the pulley 47 carried by the motor shaft is adapted todrive the fly wheel 44 through a belt 48.

At the inner side of the crosshead guide plate 22, the shaft 40 isprovided with a cam 49 and with a laterally offset crank arm 50. Thesecondary crosshead guide 29 is provided with a bearing lug 51, the flatunder surface of which rests upon the cam 49. The numeral 52 indicates aroller-equipped screw that is adapted to be secured to the crank arm indifferent positions from its axis, and works in a vertical cam slot 53formed in the crosshead plate 30.

With the construction described, when the shaft 40 is rotated, the crankarm 50 will cause the crosshead plate 30, which carries the file, toreciprocate horizontally and the cam 49 will cause the secondarycrosshead guide 29 and, hence, the said crosshead plate 30 to movevertically. The timing of the said movements is such that, at the limitof the outward movement of the file, the high portion ofthe cam 49 willcome into action on the lug 51" and will lift the cross head plate 30and the file so that the file willv be carried clear of the saw on itsreturn movement, and when said plate 30 and the file have reachedapproximately the limit of their return movement, the low portion ofsaid cam 49 will come into action on the lug 51 and will drop the plate30 and the file slightly so that the file will properly come into actionon the teeth of the saw.

The step by step feed movement of the saw is automatically produced bymeans best shown in Figs. 2, 6 and 7, andcomprises as follows: Pivotedto the face plate 18 at opposite points is a pair of reversely actingbell crank shaped levers 54, which, at their opposing upper ends, areprovided with reversely oblique screws 55 that afford adjustablecontacts and that are engageable with the beveled head 5 6formed on thefront end of an aunt? that projects from the front upper portion of thesecondary crosshead guide 29. As shown, coiled springs 58 are applied tothe screws 55 to take up slack andhold the same against accidentaladjustments. 'Reversely acting driving dogs 59, (see particularly Figs.7 and 8) are pivoted to the lowerends of the levers 50' and are adaptedto be engaged either with the teeth of the saw or with toothed barsapplied to the saw. At their outer ends, the dogs 59 arebeveled toafford flat surfaces 60 and 61 and the lower arms of the levers 50 areprovided with springpressed plungers 62 formed with heads against whichthe flat surfaces of the dogs are adapted to be seated. lVhen one of thedogs is turned upward, its surface 61 will be'engaged with thespring-pressed plunger (52 and will be yieldingly held in its operativeposition, but when the dog is turned downward, the head of thespring-pressed plunger 62 will operate on the surface 60 and yieldinglyhold the dog in position for action onthe saw teeth or on the teeth ofthe feed bar, as the case may be and as will presently more fullyappear. V

The numeral 63 indicates stop screws ad justably applied to lugs on theopposite edges 'of the face plate18 and which limit the outward orreturn movements of the dog-carrying levers 5O. Coiled springs 64;,anchored'to the faceplate 18, and attached to the upper arms of thelevers 50, tend to keep the said levers seated against the stops 63. Thefeed device described will feed a saw in either direction, but, ofcourse, only one dog 59 will be operated at any one time. Iii-theadjustment shown in Fig. 7, the saw will be fed from'the right towardthe left.

When'the crosshead plate 30 and the file have reached approximately thelimit of their outward movement, said plate and, hence, the secondarycrosshead guide 29 will, by the cam 49, be raised and the upwardmovement then imparted to the arm 57 will cause its head 56, operatingon the screws 55, to impart operative movements to the levers 50 andoperative movement to the particular dog 59 that is turned down tooperative position, thereby positively producing the saw movement.lVhen, at approximately the limit of the return movement of the plate30, the secondary crosshead guide 29 and arm 57 are lowered, the springs64 will impart the return movements to the levers 50 and the operativedog 59. Of course, there will be no feed movement produced during thetime that the file is being given its out-ward or saw-filing movement.

When the saw has been positioned, the driving dog may be properly setthereto by adjustment of the cooperating stop screw 63. \Vith the stopscrew 63 set in any particular position, the amount of movement thatwill be given to the operative dog will be determined by the adjustmentof the cooperating screw 58 in respect to the head 56. In Fig. 7, thehead 56 is'shown as just moved into contact with the screws 55 and,hence, just ready to cause the d0gfeeding movement as said head 56 ismoved upward.

In Figs. 1 and 2, the feed dog is shown as arranged to operate directlyon the saw teeth, and to support and guide the saw, I have in Figs. 1and 4 shown a stud 66 that is adjustably secured by a nut 27 and a slot68 formed in the face plate 18. At its outer.

end, this stud 66 is provided with a grooved roller ('58, in which thelower edge of the saw 0; is arranged to run. The toothed edge oi.

the saw, as shown, is arranged to run under roller-equipped studs 69applied to the face plate and these rollers keep the saw in a horizontalposition. In Figs. 6, 7 and 12, I have shown toothed saw blade clampingbars 70 and 71, which, at their ends, by means of nut-equipped bolts 72or the like, are adapted to be clamped against the opposing sides of thesaw blade, parallel to the saw teeth. As illustrated, these bars 7 0 and71 are pro vided with teeth onboth edges and the teeth on the tour edgesof the two bars are of different fineness or number per web, so that sawthey can'be utilized to correspond'to saws having diilerent'numbers ofteethper inch. The driving dog will be arranged to operate on the uppertoothed edge of the outer bar, and in Fig. 7, the right-hand dog 59 isshown as thus operating to feed the saw from the right toward the left.In Fig. 6, the numeral 73 indicates a shelf on which the. innermost ofthe two toothed bars is adapted to ride or rest.

In'Fig. (3, an upwardly spring-pressed guide head 74, subject to anadjusting screw 75, is applied to the lower portion of the visemember15, and this guide head 74 is groovedso that it will receive the ribbedback of the saw blade 6, such as shown in Fig. (3. In Figs. 13 and 14, Ihave shown a' device for holding a circle saw 6 iIi'POSI- tion forfiling. This device comprises an arbor 76 provided with a square shankthat works in a vertical slot 77 of the fixed vise member 15 andprovided with a nut 78 by means of which it may be secured in difierentvertical adjusti'nents. The outer end of the arbor 7 6 is threaded,works freely through a slot 79 in the removable vise member 16", and isprovided with a nut 80, which, when tightened, holds the member 1.6 inposition with its upturned end frictionally engaging the saw andfrict-ionally pressing the saw against a stop lug 81 on the vise member15. The saw 0 is rotative- 1y mounted on a conical hub 82 thatisscrewthreaded on the arbor 76.

In Figs. 2 and 5, I have shown horizontally spaced roller-equipped studs83 that are adapted to engage either the teeth of the or of the innerclamping bar to hold the saw in horizontal position.

By removing the hand-crank-equipped fly wheel 44 from its journal 44 onthe crosshead bearing plate 22, after the driving belt 48 has beenremoved therefrom, and mounting said fly wheel on the projecting end ofthe shaft 41 for the gear 11, the saw filing machine may be very quicklyconverted from a power-driven machine to a hand-operated machine. 1

To positively move the plate 30 and the file downward during theirreturn movement so that said file will properly come into action on theteeth oi the saw, the secondary cross head guide 29 is provided with abearing lug 51, located below the cam 49, and with the upper surface ofwhich said cam comes into action when its low portion comes into actionon the lug 51.

IVhat I claim is:

1. In a saw-filing machine, saw-guiding means, a crosshead guide, acrosshead mounted on said guide and provided with eating said crossheadto produce the file movement, a pair of opposed leversfor impartingreverse saw feed movements, reversely acting feeddogs applied one toeach of said levers and adapted to be thrown into action at will, oneat'a time, means operative intime with the crosshead movements for 20simultaneously ope 'ating said opposed levers, spring-pressedmeansoperative to hold said feed dogs in respect to said levers yieldingly inoperative or retracted positions.

In testimony whereof I aflix my signature.

HUGH B. FOLEY.

